mbostock/.block

## .block
license: gpl-3.0

## README.md

      
    Raw
  

              README.md
            
          
    Adding a little animation to the U.S. TopoJSON example to illustrate the different layers.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

svg {
  position: absolute;
  top: 0;
  left: 0;
}

path {
  stroke-linejoin: round;
}

.land-glow use {
  fill-opacity: .2;
  filter: url(#blur);
}

.land-fill {
  fill: #fff;
}

.state-boundary {
  fill: none;
  stroke: #777;
  stroke-width: .70px;
}

.county-boundary {
  fill: none;
}

.land-fill,
.county-boundary {
  stroke: #777;
  stroke-width: .35px;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>

var width = 960,
    height = 600;

var projection = d3.geo.albersUsa()
    .scale(1285)
    .translate([width / 2, height / 2]);

var path = d3.geo.path()
    .projection(projection);

d3.json("/mbostock/raw/4090846/us.json", function(error, us) {
  if (error) throw error;

  var svgGlow = d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", height)
      .attr("class", "land-glow");

  svgGlow.append("defs").append("path")
      .datum(topojson.feature(us, us.objects.land))
      .attr("id", "land")
      .attr("d", path);

  svgGlow.append("filter")
      .attr("id", "blur")
    .append("feGaussianBlur")
      .attr("stdDeviation", 5);

  svgGlow.append("use")
      .attr("xlink:href", "#land");

  d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", height)
      .attr("class", "land-fill")
    .append("use")
      .attr("xlink:href", "#land");

  d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", height)
      .attr("class", "county-boundary")
    .append("path")
      .datum(topojson.mesh(us, us.objects.counties, function(a, b) {
        return a !== b // a border between two counties
            && (a.id === 53000 || b.id === 5300 // where a and b are in puget sound
              || a.id % 1000 && b.id % 1000) // or a and b are not in a lake
            && !(a.id / 1000 ^ b.id / 1000); // and a and b are in the same state
      }))
      .attr("d", path);

  d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", height)
      .attr("class", "state-boundary")
    .append("path")
      .datum(topojson.mesh(us, us.objects.states, function(a, b) {
        return a !== b; // a border between two states
      }))
      .attr("d", path);

  var svg = d3.selectAll("svg").style("opacity", 0);
  animation();

  function animation() {
    var duration = 750,
        delay = 750,
        n = svg[0].length;

    svg.transition()
        .duration(duration)
        .delay(function(d, i) { return (duration + delay) * (n - 1 - i); })
        .style("opacity", 1)
      .transition()
        .delay(function(d, i) { return (duration + delay) * (n + i); })
        .style("opacity", 0)
        .each("end", function(d, i) { if (i === n - 1) animation(); });
  }
});

d3.select(self.frameElement).style("height", height + "px");

</script>

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	svg {
	position: absolute;
	top: 0;
	left: 0;
	}

	path {
	stroke-linejoin: round;
	}

	.land-glow use {
	fill-opacity: .2;
	filter: url(#blur);
	}

	.land-fill {
	fill: #fff;
	}

	.state-boundary {
	fill: none;
	stroke: #777;
	stroke-width: .70px;
	}

	.county-boundary {
	fill: none;
	}

	.land-fill,
	.county-boundary {
	stroke: #777;
	stroke-width: .35px;
	}

	</style>
	<body>
	<script src="//d3js.org/d3.v3.min.js"></script>
	<script src="//d3js.org/topojson.v1.min.js"></script>
	<script>

	var width = 960,
	height = 600;

	var projection = d3.geo.albersUsa()
	.scale(1285)
	.translate([width / 2, height / 2]);

	var path = d3.geo.path()
	.projection(projection);

	d3.json("/mbostock/raw/4090846/us.json", function(error, us) {
	if (error) throw error;

	var svgGlow = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height)
	.attr("class", "land-glow");

	svgGlow.append("defs").append("path")
	.datum(topojson.feature(us, us.objects.land))
	.attr("id", "land")
	.attr("d", path);

	svgGlow.append("filter")
	.attr("id", "blur")
	.append("feGaussianBlur")
	.attr("stdDeviation", 5);

	svgGlow.append("use")
	.attr("xlink:href", "#land");

	d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height)
	.attr("class", "land-fill")
	.append("use")
	.attr("xlink:href", "#land");

	d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height)
	.attr("class", "county-boundary")
	.append("path")
	.datum(topojson.mesh(us, us.objects.counties, function(a, b) {
	return a !== b // a border between two counties
	&& (a.id === 53000 \|\| b.id === 5300 // where a and b are in puget sound
	\|\| a.id % 1000 && b.id % 1000) // or a and b are not in a lake
	&& !(a.id / 1000 ^ b.id / 1000); // and a and b are in the same state
	}))
	.attr("d", path);

	d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height)
	.attr("class", "state-boundary")
	.append("path")
	.datum(topojson.mesh(us, us.objects.states, function(a, b) {
	return a !== b; // a border between two states
	}))
	.attr("d", path);

	var svg = d3.selectAll("svg").style("opacity", 0);
	animation();

	function animation() {
	var duration = 750,
	delay = 750,
	n = svg[0].length;

	svg.transition()
	.duration(duration)
	.delay(function(d, i) { return (duration + delay) * (n - 1 - i); })
	.style("opacity", 1)
	.transition()
	.delay(function(d, i) { return (duration + delay) * (n + i); })
	.style("opacity", 0)
	.each("end", function(d, i) { if (i === n - 1) animation(); });
	}
	});

	d3.select(self.frameElement).style("height", height + "px");

	</script>